In the top half of the image, a 5x2.5mm rare earth magnet has been positioned 150mm away from the Magnaprobe Mark I & has no effect. The tilt in the Magnaprobe magnet is cause by the Earth's geomagnetic field which is approximately 0.7 Gauss.

In the lower half of the image, the magnet is roughly 65mm away & can be seen to elicit a response in the Magnaprobe. The field strength of the disc magnet is estimated to be about 0.6 Gauss.

The Mark 1 Magnaprobe is sensitive enough to will respond to even the weakest of our Permanent Magnets.

Note: Avoid contacting other magnets. If you do so by accident, detach the Magnaprobe by holding its magnet. Do not simply pull back with the handle as you will ruin the device.